230 lines
8.0 KiB
C++
230 lines
8.0 KiB
C++
#pragma once
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#include <algorithm>
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#include <extra2d/core/color.h>
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#include <extra2d/core/math_types.h>
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#include <extra2d/core/types.h>
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#include <extra2d/event/event_dispatcher.h>
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#include <extra2d/graphics/render_backend.h>
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#include <functional>
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#include <string>
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#include <vector>
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namespace extra2d {
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// 前向声明
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class Scene;
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class Action;
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class RenderBackend;
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struct RenderCommand;
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// ============================================================================
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// 节点基类 - 场景图的基础
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// ============================================================================
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class Node : public std::enable_shared_from_this<Node> {
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public:
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Node();
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virtual ~Node();
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// ------------------------------------------------------------------------
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// 层级管理
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// ------------------------------------------------------------------------
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void addChild(Ptr<Node> child);
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/**
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* @brief 批量添加子节点
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* @param children 子节点列表
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*/
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void addChildren(std::vector<Ptr<Node>> &&children);
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void removeChild(Ptr<Node> child);
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void removeChildByName(const std::string &name);
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void removeFromParent();
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void removeAllChildren();
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Ptr<Node> getParent() const { return parent_.lock(); }
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const std::vector<Ptr<Node>> &getChildren() const { return children_; }
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Ptr<Node> getChildByName(const std::string &name) const;
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Ptr<Node> getChildByTag(int tag) const;
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// ------------------------------------------------------------------------
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// 变换属性
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// ------------------------------------------------------------------------
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void setPosition(const Vec2 &pos);
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void setPosition(float x, float y);
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Vec2 getPosition() const { return position_; }
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void setRotation(float degrees);
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float getRotation() const { return rotation_; }
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void setScale(const Vec2 &scale);
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void setScale(float scale);
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void setScale(float x, float y);
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Vec2 getScale() const { return scale_; }
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void setAnchor(const Vec2 &anchor);
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void setAnchor(float x, float y);
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Vec2 getAnchor() const { return anchor_; }
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void setSkew(const Vec2 &skew);
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void setSkew(float x, float y);
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Vec2 getSkew() const { return skew_; }
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void setOpacity(float opacity);
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float getOpacity() const { return opacity_; }
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void setVisible(bool visible);
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bool isVisible() const { return visible_; }
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void setZOrder(int zOrder);
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int getZOrder() const { return zOrder_; }
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// ------------------------------------------------------------------------
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// 世界变换
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// ------------------------------------------------------------------------
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Vec2 convertToWorldSpace(const Vec2 &localPos) const;
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Vec2 convertToNodeSpace(const Vec2 &worldPos) const;
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glm::mat4 getLocalTransform() const;
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glm::mat4 getWorldTransform() const;
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/**
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* @brief 标记变换矩阵为脏状态，并传播到所有子节点
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*/
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void markTransformDirty();
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// ------------------------------------------------------------------------
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// 名称和标签
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// ------------------------------------------------------------------------
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void setName(const std::string &name) { name_ = name; }
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const std::string &getName() const { return name_; }
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void setTag(int tag) { tag_ = tag; }
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int getTag() const { return tag_; }
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// ------------------------------------------------------------------------
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// 生命周期回调
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// ------------------------------------------------------------------------
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virtual void onEnter();
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virtual void onExit();
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virtual void onUpdate(float dt);
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virtual void onRender(RenderBackend &renderer);
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virtual void onAttachToScene(Scene *scene);
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virtual void onDetachFromScene();
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// ------------------------------------------------------------------------
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// 边界框（用于空间索引）
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// ------------------------------------------------------------------------
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virtual Rect getBoundingBox() const;
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// 是否需要参与空间索引（默认 true）
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void setSpatialIndexed(bool indexed) { spatialIndexed_ = indexed; }
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bool isSpatialIndexed() const { return spatialIndexed_; }
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// 更新空间索引（手动调用，通常在边界框变化后）
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void updateSpatialIndex();
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// ------------------------------------------------------------------------
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// 动作系统
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// ------------------------------------------------------------------------
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void runAction(Ptr<Action> action);
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void stopAllActions();
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void stopAction(Ptr<Action> action);
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void stopActionByTag(int tag);
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Ptr<Action> getActionByTag(int tag) const;
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size_t getActionCount() const { return actions_.size(); }
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// ------------------------------------------------------------------------
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// 事件系统
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// ------------------------------------------------------------------------
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EventDispatcher &getEventDispatcher() { return eventDispatcher_; }
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// ------------------------------------------------------------------------
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// 内部方法
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// ------------------------------------------------------------------------
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void update(float dt);
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void render(RenderBackend &renderer);
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void sortChildren();
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bool isRunning() const { return running_; }
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Scene *getScene() const { return scene_; }
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// 多线程渲染命令收集
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virtual void collectRenderCommands(std::vector<RenderCommand> &commands,
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int parentZOrder = 0);
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protected:
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// 子类重写
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virtual void onDraw(RenderBackend &renderer) {}
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virtual void onUpdateNode(float dt) {}
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virtual void generateRenderCommand(std::vector<RenderCommand> &commands,
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int zOrder) {};
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// 供子类访问的内部状态
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Vec2 &getPositionRef() { return position_; }
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Vec2 &getScaleRef() { return scale_; }
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Vec2 &getAnchorRef() { return anchor_; }
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float getRotationRef() { return rotation_; }
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float getOpacityRef() { return opacity_; }
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private:
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// ==========================================================================
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// 成员变量按类型大小降序排列，减少内存对齐填充
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// 64位系统对齐：std::string(32) > glm::mat4(64) > std::vector(24) >
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// double(8) > float(4) > int(4) > bool(1)
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// ==========================================================================
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// 1. 大块内存（64字节）
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mutable glm::mat4 localTransform_; // 64 bytes
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mutable glm::mat4 worldTransform_; // 64 bytes
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// 2. 字符串和容器（24-32字节）
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std::string name_; // 32 bytes
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std::vector<Ptr<Node>> children_; // 24 bytes
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// 3. 子节点索引（加速查找）
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std::unordered_map<std::string, WeakPtr<Node>> nameIndex_; // 56 bytes
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std::unordered_map<int, WeakPtr<Node>> tagIndex_; // 56 bytes
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// 4. 动作系统（使用 unordered_map 加速 tag 查找）
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std::unordered_map<int, Ptr<Action>> actionByTag_; // 56 bytes
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std::vector<Ptr<Action>> actions_; // 24 bytes（无 tag 的 Action）
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// 5. 事件分发器
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EventDispatcher eventDispatcher_; // 大小取决于实现
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// 6. 父节点引用
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WeakPtr<Node> parent_; // 16 bytes
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// 7. 变换属性（按访问频率分组）
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Vec2 position_ = Vec2::Zero(); // 8 bytes
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Vec2 scale_ = Vec2(1.0f, 1.0f); // 8 bytes
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Vec2 anchor_ = Vec2(0.5f, 0.5f); // 8 bytes
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Vec2 skew_ = Vec2::Zero(); // 8 bytes
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// 8. 边界框（用于空间索引）
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Rect lastSpatialBounds_; // 16 bytes
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// 9. 浮点属性
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float rotation_ = 0.0f; // 4 bytes
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float opacity_ = 1.0f; // 4 bytes
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// 10. 整数属性
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int zOrder_ = 0; // 4 bytes
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int tag_ = -1; // 4 bytes
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// 11. 场景指针
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Scene *scene_ = nullptr; // 8 bytes
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// 12. 布尔标志（打包在一起）
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mutable bool transformDirty_ = true; // 1 byte
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mutable bool worldTransformDirty_ = true; // 1 byte
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bool childrenOrderDirty_ = false; // 1 byte
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bool visible_ = true; // 1 byte
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bool running_ = false; // 1 byte
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bool spatialIndexed_ = true; // 1 byte
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// 填充 2 bytes 到 8 字节对齐
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};
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} // namespace extra2d
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